My cardiologist challenged my heat rate data just last week with the statement his hardware was more accurate. I assume it is since to use it I had to wear sticky pads and a bunch of wires. He was not interested at all in my collected data but it was the data that prompted me to make an appointment. I'm fine based on the tests and will continue to wear my watch as I have since launch so its still relevant to me.
Same and while that machine was connected to me, I checked its bpm with the one my Apple Watch says. it was 1-2 off, so pretty accurate for a long term review of the data it collected.
For me the problem is I sometimes get 120+ BPM while sitting for no apparent reason and the Apple Watch warns me about that.
During the check up my doctor did, everything was fine.
I am really concerned not being taken seriously.
In May last year I had chest pain (cause of some dumb **** I tried - codeine) and thought I'm going to die.
And since then these warnings from the Apple Watch appeared.